Biostar MCP6PB M2+ Power Up Barebones Kit for $269.99
TigerDirect offers the Biostar MCP6PB M2+ Power Up Barebones Kit for $269.99. This is the best price for this product in the US market. The Biostar MCP6PB M2+ features AMD Phenom X4 9850 CPU, Crucial 2048MB RAM, Seagate Barracuda LP HD, and Samsung Internal DVD Writer.

NewEgg offers the Shuttle SX58J3 barebone for $529.99. The Shuttle SX58J3 supports up to 16GB of DDR3 memory, 4 x SATAII drive, and the Intel Core i7 CPU.
Newegg offers the ASUS TW100-E5 barebone server for $299.99, after $70.00 instant off. The ASUS TW100-E5 supports Intel Core2 QX9000/Q9000, Core2 Duo E8000/E7000, Core2 Q6000, Core2 Duo E6000, Pentium E2220, and Intel Celeron processors, 8GB of DDR2 memory, and has the integrated Quadro FX470 graphics. This barebone server features a 390W power supply.
NewEgg offers the MSI Black Wind PC for $134.99. The MSI Wind PC supports up to 2GB of DDR2 memory, 2 x SATAII 300 drive, and features the Intel Atom processor at 1.6GHz and integrated Intel GMA 950 graphics.
Newegg offers the Foxconn R10-S4 barebone desktop for $119.99. This is the best price for this product in the US market. The Foxconn R10-S4 supports the Intel Dual-core Atom 330 processors, and up to 2GB of DDR2 memory, and has a power supply.
NewEgg offers the Jetway HBJC230C63P-330D-B desktop PC for $249.99, after $50.00 instant off. The Jetway HBJC230C63P-330D-B features the Intel Atom 330 processor at 1.6GHz, up to 4GB of DDR2 memory, and the integrated NVIDIA ION graphics.
NewEgg offers the Shuttle SA76G2 barebone PC for $184.99, after $15.00 instant off. It ships for free. The Shuttle SA76G2 supports the AMD Phenom II / Phenom / Athlon 64 X2 / Athlon 64 processors, and up to 8GB of DDR2 memory. It has the onboard ATI Radeon 3000 graphics and a 250W power supply.
NewEgg offers the MSI 6667BB-004US desktop PC for $169.99, after $10.00 instant off. The MSI 6667BB-004US features the Intel Dual Core Atom N330 processor at 1.6GHz, up to 2GB of DDR2 memory, and the Integrated ATI Radeon HD 4330 graphics.